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journals on concrete admixtures

journals on concrete admixtures - ocmd

journals on concrete admixtures. Concrete Admixtures Handbook - (2) - ScienceDirect . The online version of Concrete Admixtures Handbook by V.S. Ramachandran on ScienceDirect, the world's leading platform for high quality peer-reviewed full-text books. The effect of mineral admixture type on the modulus of ... Yildiz and Ugur 795 Figure 1. aComparator mechanism and data logger, bunbroken ...

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High Performance Concrete Admixtures

Admixtures are the ingredients in concrete which are other than the hydraulic cementitious material, water, aggregates or fiber reinforcement that are used as ingredients of a cementitious mixture to modify its freshly mixed, setting or hardened properties and that are added to the batch before or during mixing.

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Mineral Admixtures used in Concrete and Their Importance ...

In general, all mineral admixtures reduce bleeding of concrete. Admixtures with finer particle size and higher specific surface area are suitable for preparing high density and low permeability concrete. Increase in water demand due to addition of admixtures may be handled by the use of an effective superplasticizer. All these factors contribute significantly to the rise in use of mineral ...

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Experimental Study on the Concrete with Compound Admixture ...

In order to study the performance of concrete with compound admixture of iron tailings and slag powder under low cement clinker system, the mixture ratio of different iron tailings powder and slag powder was designed to prepare C30 and C50 concrete. The workability, strength, carbonation depth, chloride diffusion coefficient, scanning electron microscopy (SEM), energy .

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Hot weather concreting with admixtures - ScienceDirect

The effect of water reducing and retarding admixtures (type D, ASTM C494) on plastic shrinkage and plastic shrinkage cracking, and the effect of fly ash class F (ASTM C 618) on slump loss, are also discussed. It is concluded that type D admixtures accelerate, rather than slow down the rate of slump loss in concrete subjected to prolonged mixing, but such admixtures are advantageous when used ...

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High Performance Concrete Admixtures

Admixtures are the ingredients in concrete which are other than the hydraulic cementitious material, water, aggregates or fiber reinforcement that are used as ingredients of a cementitious mixture to modify its freshly mixed, setting or hardened properties and that are added to the batch before or during mixing.

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Types of Admixtures of Concrete & Cement | Chemical, Mineral

Admixtures of concrete are generally used to alter the properties of concrete (such as increased workability or reduced water content, acceleration or retardation of setting time, acceleration of strength development, and improved resistance to weather and chemical attacks) to make it more suitable for a particular purpose. For example, calcium chloride can be used to accelerate strength ...

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Recent Cement and Concrete Research Articles - Elsevier

CiteScore: 11.0 ℹ CiteScore: 2019: 11.0 CiteScore measures the average citations received per peer-reviewed document published in this title. CiteScore values are based on citation counts in a range of four years (e.g. 2016-2019) to peer-reviewed documents (articles, reviews, conference papers, data papers and book chapters) published in the same four calendar years, divided by the number of ...

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Concrete Admixtures - Sika

Sika's concrete admixtures help you meet the challenges of modern concrete technology and the construction business. Precast Concrete Industry. Wet Precast Concrete; Structural design and construction with precast concrete elements require versatile products, from wet precast production to erection on site. Sika, a full range supplier, meets the diverse complexity of the entire precast ...

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Different types of concrete admixtures - Constro Facilitator

With this type of admixture, concrete properties are improved and help place concrete under difficult conditions. Retarding admixtures. Retarding admixtures (retarders) are known to delay hydration of cement without affecting the long-term mechanical properties. They are used in concrete to offset the effect of high temperatures, which decrease setting times, or to avoid complications when ...

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Hot weather concreting with admixtures - ScienceDirect

The effect of water reducing and retarding admixtures (type D, ASTM C494) on plastic shrinkage and plastic shrinkage cracking, and the effect of fly ash class F (ASTM C 618) on slump loss, are also discussed. It is concluded that type D admixtures accelerate, rather than slow down the rate of slump loss in concrete subjected to prolonged mixing, but such admixtures are advantageous when used ...

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Hot weather concreting with admixtures - ScienceDirect

The effect of water reducing and retarding admixtures (type D, ASTM C494) on plastic shrinkage and plastic shrinkage cracking, and the effect of fly ash class F (ASTM C 618) on slump loss, are also discussed. It is concluded that type D admixtures accelerate, rather than slow down the rate of slump loss in concrete subjected to prolonged mixing, but such admixtures are advantageous when used ...

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Concrete Admixtures – Types and Functions – Cement Concrete

Concrete admixtures have various functions and they are as follows: (a) To increase the rate of strength development at early ages – calcium chloride is the most widely used accelerator, (b) To retard the initial setting time while pumping concrete over a long distance, (c To increase the workability without changing the water content – pozzolana such as fly ash is used, Fig. Admixture ...

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Effect of Usage of Admixture in Concrete

Chemical admixtures are added to concrete in very small amounts mainly for air entrainment, reduction of water or cement content, plasticizing of fresh concrete mixtures or to control the setting time of concrete. These admixtures can be broadly catagorised as superplasticizers, accelerators, retarders, water reducers and air entraining admixtures.

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Materials | Free Full-Text - Publisher of Open Access Journals

Hence, the use of local mineral admixtures in Northwest China in concrete mixtures would be beneficial to the performance of concrete, as well as to the protection of environment. Next Article in Journal. Solid-State Synthesis and Photocatalytic Activity of Polyterthiophene Derivatives/TiO 2 Nanocomposites. Previous Article in Journal . Effects of Asymmetric Quantum Wells on the Structural and ...

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15 Types of Admixtures Used in Concrete - The Constructor

Seven Must-Use Concrete Admixtures (Additives)

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Admixtures in concrete - Designing Buildings Wiki

Admixtures are added to the concrete, in addition to cement, water and aggregate, typically immediately before or during the mixing process. Admixtures can be used to reduce the cost of building with concrete, or to ensure certain required properties or quality of the cured concrete.

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All about Concrete Admixtures | Dosage & Cost | Admixture ...

2020-08-20· Waterproof admixtures used to prevent the water penetration to the hardened concrete which later causes chemical attacks and corrosion to steel reinforcement. The admixture creates small crystal particles, which later fills up the pores in concrete.

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Concrete Mix Design (Journal Paper) | CivilDigital

2017-03-15· The recent development of using chemical and mineral admixtures in concrete has not alterted the applicability of the age-old Abram's water-cement ratio 'law', and the compressive strength of concrete is governed by the water-cementitious materials ratio used in concrete. The cementitious materials include cement (OPC, PPC and PSC) and mineral admixtures, like, flyash, ggbs and silica ...

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(PDF) Influence of Admixtures on Behavior of Concrete

This study highlights both fundamental aspects resulting from the use of mineral admixtures in HPC. Concrete mixtures with two water-binder ratios (w/b) of 0.35 and 0.30, and three types of ...

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Concrete Admixtures - types and functions - Structural Guide

2019-11-04· Concrete admixtures have become a mandatory component in modern concrete construction works with its wide development to enhance the quality, workability, strength, etc. of the concrete. With the wide use of these materials, it is very important to be aware of the concrete admixtures. The first patent for the calcium chloride in concrete was obtained in 1873 in Germany, and admixtures .

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Application of Mineral Admixture in High Performance Concrete

concrete, the mineral admixture content should reach at least 30%, and it is better to use it in combination. A large amount of concrete mixed with mineral admixtures also meets the requirements of environmental protection and sustainable development, as well as the basic condition for the preparation of green concrete. If the durability requirement of concrete is very high, a small amount of ...

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Effect of Accelerating Admixture on Properties of Concrete

Effect of Accelerating Admixture on Properties of Concrete International organization of Scientific Research 49 | P a g e application. Most Concrete specifications restrict the use of calcium chloride or admixtures containing calcium chloride to plain unreinforced concrete and ban it for structural concrete that contains embedded metal. In this research, sodium nitrite is used as accelerating ...

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Study of Sorptivity of Self-Compacting Concrete with ...

Study of Sorptivity of Self-Compacting Concrete with Different Chemical Admixtures By Saeed Alsheikh MTI University- Cairo,Egypt . Abstract - The influence of chemical admixtures on the properties of Self-Compacting Concrete (SCC) was investigated. All types of used admixtures were the same percentage of 1.4% according technical data. The water – cement ratio was maintained at 0.36 for all ...

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Seven Must-Use Concrete Admixtures (Additives)

Admixtures are chemicals that are added to concrete immediately before or during mixing to alter the properties, generally in the fresh state. However, because they act on the cement paste phase, they are considered in this section.

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All about Concrete Admixtures | Dosage & Cost | Admixture ...

2020-08-20· Waterproof admixtures used to prevent the water penetration to the hardened concrete which later causes chemical attacks and corrosion to steel reinforcement. The admixture creates small crystal particles, which later fills up the pores in concrete.

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Recent Cement and Concrete Research Articles - Elsevier

CiteScore: 11.0 ℹ CiteScore: 2019: 11.0 CiteScore measures the average citations received per peer-reviewed document published in this title. CiteScore values are based on citation counts in a range of four years (e.g. 2016-2019) to peer-reviewed documents (articles, reviews, conference papers, data papers and book chapters) published in the same four calendar years, divided by the number of ...

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COMPLEX ADMIXTURES FOR HIGH-STRENGTH CONCRETE: Journal .

(2002). COMPLEX ADMIXTURES FOR HIGH-STRENGTH CONCRETE. Journal of Civil Engineering and Management: Vol. 8, No. 4, pp. 276-280.

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MUHU's Technology and Equipment - Concrete Admixtures

Concrete Admixture Technology know-how Transfer . In order to provide one-stop service to customers, MUHU also offers know-how transfer besides supplying products. Watch this video for detailed information of the production equipment and technology know-how transfer of concrete admixtures. The coverage of technology know-how transfer : Equipment: 1. Production line Designing technical ...

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Admixtures for Concrete - Memphis

Concrete Admixtures by Classification Type of admixture Desired effect Material Accelerators Accelerate setting and early-strength Calcium chloride (ASTM D 98 and AASHTO M 144) (ASTM C 494 and development Triethanolamine, sodium thiocyanate, calcium formate, AASHTO M 194, Type C) calcium nitrite, calcium nitrate Air detrainers Decrease air content Tributyl phosphate, dibutyl .

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